Which of the following is the most widely used method for refining impure metals?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Electrolytic Refining.
The most widely used method for refining impure metals is Electrolytic Refining. This method involves using an electric current to separate pure metal from impurities. The impure metal is made the anode, and a pure metal is used as the cathode in an electrolytic cell. As the current passes through the electrolyte solution, the metal ions from the anode dissolve and deposit onto the cathode as pure metal, effectively purifying the metal. This technique is commonly used for refining copper, zinc, and other metals.